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| //tcp.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <fcntl.h>
#include <sys/epoll.h>
#include <pthread.h>
int createServerSocket()
{
int sock = socket(PF_INET, SOCK_STREAM, 0);
assert(sock > 0);
return sock;
}
void bindSocket(int _socket, int _port)
{
struct sockaddr_in servaddr;
memset(&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(_port);
int ret = bind(_socket, (struct sockaddr*)&servaddr, sizeof(servaddr));
assert(ret == 0);
}
void make_socket_addr_reuse (int _socket)
{
int optval = 1;
int ret1 = setsockopt(_socket, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
int ret2 = setsockopt(_socket, SOL_SOCKET, SO_REUSEPORT, &optval, sizeof(optval));
assert(ret1 == 0);
assert(ret2 == 0);
}
void listenSocket(int _socket)
{
listen(_socket,5);
}
void make_socket_non_blocking (int _socket)
{
int flags = fcntl (_socket, F_GETFL, 0);
assert(flags != -1);
flags |= O_NONBLOCK;
int ret = fcntl (_socket, F_SETFL, flags);
assert(ret == 0);
}
int createEpoll(int _size)
{
int epollfd = epoll_create(_size);
assert(epollfd > 0);
}
void epollClear(int _epoll, int fd)
{
int ret = epoll_ctl(_epoll, EPOLL_CTL_DEL, fd, NULL);
assert(0 == ret);
}
void epollAddET(int _epoll, int fd, int mask)
{
struct epoll_event epEvent;
memset(&epEvent, 0,sizeof(epEvent));
epEvent.data.fd = fd;
epEvent.events = mask | EPOLLET;
int ret = epoll_ctl(_epoll, EPOLL_CTL_ADD, fd, &epEvent);
assert(0 == ret);
}
void epollAddLT(int _epoll, int fd, int mask)
{
struct epoll_event epEvent;
memset(&epEvent, 0,sizeof(epEvent));
epEvent.data.fd = fd;
epEvent.events = mask;
int ret = epoll_ctl(_epoll, EPOLL_CTL_ADD, fd, &epEvent);
assert(0 == ret);
}
int epollwait(int _epoll, struct epoll_event *events, int _maxEvents)
{
int ret = epoll_wait(_epoll, events, _maxEvents, -1);
assert(ret > 0);
return ret;
}
void handleClientSock(int _epollfd, int clientSock)
{
char recv_buffer[2]="";
int bytes = read(clientSock, recv_buffer, sizeof(recv_buffer));
printf("recv %d byte[%s] from sock %d\n", bytes,recv_buffer, clientSock);
if(bytes <= 0){
//printf("close sock %d\n", clientSock);
epollClear(_epollfd, clientSock);
close(clientSock);
printf("[CLOSE SOCKET %d]=====================\n",clientSock);
}
}
void handleAcceptSock(int _epollfd, int serverSock)
{
struct sockaddr_in client_addr;
socklen_t client_len = sizeof(client_addr);
int client = accept(serverSock, (struct sockaddr *)&client_addr, &client_len);
assert(client > 0);
epollAddLT(_epollfd, client, EPOLLIN);
printf("[ACCEPT SOCKET %d]=====================\n",client);
}
void* masterThreadBody(void *arg)
{
int epollfd = createEpoll(100);
int tcpsocket = (int)arg;
printf("[epoll thread create. sock = %d]\n", tcpsocket);
epollAddET(epollfd, tcpsocket, EPOLLIN);
struct epoll_event fired_events[100];
while(1)
{
int eventCount = epollwait(epollfd, fired_events, 100);
assert(eventCount > 0);
int i=0;
for(;i<eventCount;i++)
{
printf("[epoll awake. event sock = %d]\n", fired_events[i].data.fd);
if(fired_events[i].data.fd == tcpsocket){
handleAcceptSock(epollfd,fired_events[i].data.fd);
}else{
handleClientSock(epollfd,fired_events[i].data.fd);
}
}
}
return NULL;
}
pthread_t createMasterThread(int tcpSock)
{
pthread_t tid;
int ret = pthread_create(&tid,NULL,masterThreadBody,(void*)tcpSock);
assert(ret == 0);
return tid;
}
int main(int argc, char** argv)
{
int sock = createServerSocket();
make_socket_addr_reuse(sock);
bindSocket(sock, 666);
listenSocket(sock);
pthread_t tid = createMasterThread(sock);
pthread_join(tid, NULL);
}
|